#!/bin/sh

# Copyright (c) 2015, Plume Design Inc. All rights reserved.

# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#   1. Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#   2. Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in the
#      documentation and/or other materials provided with the distribution.
#   3. Neither the name of the Plume Design Inc. nor the
#      names of its contributors may be used to endorse or promote products
#      derived from this software without specific prior written permission.

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL Plume Design Inc. BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


if [ -z "$1" ] || [ ! -f "$1" ] ; then
  echo
  echo "Usage $0: Require firmware tarfile"
  exit 1
fi

TARFILE=$1
TMPDIR=/tmp/tmpdir
UPGFILE="upgrade.tar"

if tar tf $TARFILE 2> /dev/null 1>&2; then
  TARCMD="/bin/tar -xf"
else
  TARCMD="/bin/tar -xzf"
fi

# Extract tar.gz
cd /tmp
mkdir -p $TMPDIR
$TARCMD $TARFILE -C $TMPDIR
if [ "$?" != "0" ] ; then
  rm $TARFILE
  rm -fr $TMPDIR
  exit 1
fi
rm $TARFILE

cd $TMPDIR
IMGFILE=`ls *sysupgrade.bin`
CSMFILE="sha256sums"

if [ ! -f "$IMGFILE" ] && [ ! -f "$CSMFILE" ] ; then
  echo "$0: Image or checksum file does not exist"
  cd /tmp
  rm -fr $TMPDIR
  exit 1
fi

# Validate checksum
sha256sum -c sha256sums 2>/dev/null|grep OK
if [ "$?" != "0" ] ; then
  echo "$0: Validation failed."
  cd /tmp
  rm -fr $TMPDIR
  exit 1
fi

# Create upgrade.tar
cd /tmp
tar -cf $UPGFILE -C $TMPDIR $IMGFILE $CSMFILE
if [ "$?" != "0" ] ; then
  echo "$0: Failed to create upgrade.tar"
  rm -fr $TMPDIR
  exit 1
fi

rm -fr $TMPDIR

exit 0